GarageNation Hyderabad is the city's specialist for catalytic converter — Catalytic converter cleaning, P0420 diagnosis, O2 sensor replacement, SCR/AdBlue systems, and GPF cleaning for petrol and diesel cars in Hyderabad. 16+ years experience, 30,000+ cars serviced, 35+ brands. 1-year warranty. Free pickup & drop. Call +91 8106316369.
Can a catalytic converter be cleaned or does it need replacement?
Cleaning works for 50–60% of cases — where the catalyst coating is intact but fouled with carbon, oil, or fuel residue. GarageNation uses a two-stage process: an in-situ chemical flush followed by a heat cycle. If the substrate (ceramic honeycomb) is cracked or physically damaged, replacement is needed.
How much does catalytic converter cleaning cost vs replacement in Hyderabad?
Cat cleaning at GarageNation: ₹4,000–₹18,000. Cat replacement: ₹18,000–₹65,000 for OEM or ₹8,000–₹25,000 for OEM-equivalent. We always try cleaning first — it resolves P0420 in 55–60% of cars. If the code returns within 500 km, replacement is the definitive solution.
Is OEM or aftermarket catalytic converter better?
OEM catalysts use higher precious metal loading and tighter substrate cell density — they last longer and perform better for emissions. GarageNation fits OEM catalysts where available and OEM-equivalent (Bosch, Magneti Marelli, or Cataclean-certified) where OEM isn't cost-effective. We never fit bare honeycomb 'universal' catalysts that fail P0420 within 10,000 km.
Why is my catalytic converter rattling?
A rattling catalyst means the ceramic honeycomb substrate has broken loose inside the metal housing from physical impact or thermal shock. The fragments block exhaust flow, causing back-pressure and power loss. This is not fixable by cleaning — replacement is needed. A rattle from a catalyst can also damage O2 sensors downstream if fragments exit the cat.
How do I know if my O2 sensor or the catalyst has failed (both give P0420)?
P0420 specifically indicates the downstream O2 sensor sees similar voltage patterns to the upstream — meaning the catalyst is not doing its job. If the P0420 code is present but the downstream sensor waveform looks correct (flat, low voltage), the catalyst has failed. If the downstream waveform mirrors the upstream, the downstream sensor may have failed. GarageNation's OEM scan analysis distinguishes these.
Can I drive with an O2 sensor fault code?
Yes, temporarily — the car runs on a fixed fuel map ('open loop') when the O2 sensor fails, which is safe but inefficient. Fuel consumption typically rises 10–15%. However, a failed O2 sensor allows the engine to run rich, which poisons the catalytic converter within 10,000–20,000 km. Repair within a few weeks.
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